桑树新品种农桑12号、农桑14号的鉴定成绩与栽培技术

早生中熟桑树新品种农桑12、14号经区试鉴定,hm2桑产叶量分别比对照种荷叶白增加18．73％和29．78％,分别显著和极显著高于对照;万头蚕产茧层量分别比对照高8．03％和6．12％。分别极显著和显著高于对照。抗桑黄化型萎缩病和桑疫病强于对照。桑蓟马、红蜘蛛等为害明显轻于对照。生长势旺,发根力强,可用扦插繁殖,农艺性状优良,适应性广。

Results of Identification on Two New Mulberry Varieties, Nong-Sang No.12 and Nong-Sang No.14 and the Cultivation Technique:

Two new medium budding varieties of mulberry , Nong-Sang No.12 and No.14, were bred and passed through regional test. The yields of mulberry leaves per ha were increased by 18.17% and 29.78%, i.e. significantly higher than that of the control variety "He-Ye-Bai". The cocoon shell weights of 10000 silkworms fed on the new mulberry leaves were increased by 8.03%, 6.12% respectively, which are also significantly higher than that of the control. The resistance to yellow dwarf disease and black bacterial blight were stronger than that of the control. The harmfulness of mulberry thrips (Pseudodendro thrips mori. Niwa)and two-spotted spinder mite (Tetranychus urricae Koch.) was significantly lower than that of the control. The two new mulberry varieties have some other characteristics better than the control, such as vigorous growth, higher rooting power, reproducible by cutting, better agronomic characteristics, and wide adaptability.